PATIKIL 2" (50mm) Focal Length Double Convex Lens, 3 Pcs 30mm Diameter 5mm Height Glass Optically Polished Round Edges Lens for Physics Experiment, Clear workwarehouse Big enough to last for

Big enough to last for a couple of uses before the need to refill but compact enough to save counter space

Multifunctional Pressure TesterThe gas pressure gauge can store data by entering REC mode to read max/min/average value during recording

Extra Durable: Replace your cable and add more for home

[Sturdy & Durable] : Made of durable spring steel material with polished surface treatment

PATIKIL 2" (50mm) Focal Length Double Convex Lens, 3 Pcs 30mm Diameter 5mm Height Glass Optically Polished Round Edges Lens for Physics Experiment, Clear workwarehouse Big enough to last forPATIKIL 2" (50mm) Focal Length Double Convex Lens, 3 Pcs 30mm Diameter 5mm Height Glass Optically Polished Round Edges Lens for Physics Experiment, Clear The double convex lens is a type of lens that is thicker at the center than at the edges and is used to gather light. It can make telescopes, suitable for a variety of applications, including scientific experiments, photography, and optical instruments. Specification Color: Transparent Material: